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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 4 |
| 2 | 10 |
| 3 | 22 |
| 4 | 44 |
| 5 | 82 |
| 6 | 145 |
| 7 | 248 |
| 8 | 410 |
| 9 | 658 |
| 10 | 1036 |
| 11 | 1598 |
| 12 | 2420 |
| 13 | 3614 |
| 14 | 5322 |
| 15 | 7738 |
| 16 | 11132 |
| 17 | 15850 |
| 18 | 22353 |
| 19 | 31260 |
| 20 | 43366 |
| 21 | 59708 |
| 22 | 81650 |
| 23 | 110932 |
| 24 | 149788 |
| 25 | 201112 |
| 26 | 268562 |
| 27 | 356790 |
| 28 | 471732 |
| 29 | 620834 |
| 30 | 813480 |
| 31 | 1061496 |
| 32 | 1379626 |
| 33 | 1786282 |
| 34 | 2304440 |
| 35 | 2962566 |
| 36 | 3795921 |
| 37 | 4848160 |
[1,4,10,22,44,82,145,248,410,658,1036,1598,2420, 3614,5322,7738,11132,15850,22353,31260,43366, 59708,81650,110932,149788,201112,268562,356790, 471732,620834,813480,1061496,1379626,1786282, 2304440,2962566,3795921,4848160] |